Hi Karl,
Great to get some confirmation of this second radiant. A second radiant more or less overhead (from Brisbane) at midnight would explain everything I saw. It would also explain:
1. the meteors Geoff saw heading East at 90 degrees to the shower;
2. the meteors I saw deep in the South that I assumed were Geminids; and
3. the meteors seen by myself and Rob heading North.
I had assumed there was another radiant in the South causing me to see many meteors heading North against the Geminid stream. A second radiant overhead explains all of this.
If this is the case, this second radiant had far higher activity than the Geminids between about midnight and 1am from my location near Brisbane.
I would love to see a link to your video
Have fun,
Doug